On Tue, Mar 24, 2020 at 11:09 AM Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote: > > Currently on ACPI-enabled systems the USB interface device has no link to > the actual firmware node and thus drivers may not parse additional information > given in the table. The new feature, proposed here, allows to pass properties > or other information to the drivers. > > The ACPI companion of the device has to be set for USB interface devices > to achieve above. Use ACPI_COMPANION_SET macro to set this. > > Note, OF already does link of_node and this is the same for ACPI case. > > Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> > --- > v2: rewrite commit message to emphasize that it is a new feature (Greg) > drivers/usb/core/message.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c > index 5adf489428aa..d5f834f16993 100644 > --- a/drivers/usb/core/message.c > +++ b/drivers/usb/core/message.c > @@ -5,6 +5,7 @@ > * Released under the GPLv2 only. > */ > > +#include <linux/acpi.h> > #include <linux/pci.h> /* for scatterlist macros */ > #include <linux/usb.h> > #include <linux/module.h> > @@ -1941,6 +1942,7 @@ int usb_set_configuration(struct usb_device *dev, int configuration) > intf->dev.of_node = usb_of_get_interface_node(dev, > configuration, ifnum); > } > + ACPI_COMPANION_SET(&intf->dev, ACPI_COMPANION(&dev->dev)); > intf->dev.driver = NULL; > intf->dev.bus = &usb_bus_type; > intf->dev.type = &usb_if_device_type; > -- > 2.25.1 >
